<template>
  <div id="home" class="wrapper">
    <nav-bar class="home-nav"><div slot="center">购物街</div></nav-bar>
    <scroll
      class="content"
      ref="scroll"
      :probe-type="3"
      @scroll="contentScroll"
      :pull-up-load="true"
      @pullingUp="loadMore"
    >
      <home-swiper :banners="banners" />
      <recommend-view :recommends="recommends" />
      <feature-view />
      <tab-control
        class="tab-control"
        :titles="['流行', '新款', '精选']"
        @tabClick="tabClick"
      />
      <good-list :goods="showGoods"></good-list>
    </scroll>
    <div>呵呵呵呵</div>
    <back-top @click.native="backTopClick" v-show="isShowBackTop" />
  </div>
</template>

<script>
import HomeSwiper from "./childComps/HomeSwiper";
import RecommendView from "./childComps/RecommendView";
import FeatureView from "./childComps/FeatureView";

import NavBar from "components/common/navbar/NavBar";
import TabControl from "components/content/tabControl/TabControl";
import GoodList from "components/content/goods/GoodsList";
import Scroll from "components/common/scroll/Scroll";
import BackTop from "components/content/backTop/BackTop";

// import { debounce } from "common/utils";
// 导入混入
import { imgListenerMixin, backTopMixin } from "common/mixin";

import { getHomeMultidata, getHomeGoods } from "network/home";

export default {
  components: {
    HomeSwiper,
    RecommendView,
    FeatureView,
    NavBar,
    TabControl,
    GoodList,
    Scroll,
    BackTop,
  },
  data() {
    return {
      banners: [],
      recommends: [],
      goods: {
        pop: { page: 0, list: [] },
        new: { page: 0, list: [] },
        sell: { page: 0, list: [] },
      },
      currentType: "pop",

      saveY: 0,
    };
  },

  mixins: [imgListenerMixin, backTopMixin],

  computed: {
    showGoods() {
      return this.goods[this.currentType].list;
    },
  },
  created() {
    // 1.请求多个数据
    this.getHomeMultidata();

    // 2.请求商品数据
    this.getHomeGoods("pop");
    this.getHomeGoods("new");
    this.getHomeGoods("sell");
  },
  // mounted() {
  //   const refresh = debounce(this.$refs.scroll.refresh, 50);
  //   // this.$bus.$on("imageItemLoad", () => {
  //   //   refresh();
  //   // });
  //   this.$bus.$on("homeImage", () => {
  //     refresh();
  //   });
  // },
  activated() {
    this.$refs.scroll.scrollTo(0, this.saveY, 0);
    this.$refs.scroll.refresh();
  },

  deactivated() {
    this.saveY = this.$refs.scroll.getScrollY();

    this.$bus.$off("imageItemload", this.imgListener);
  },
  methods: {
    /**
     * 事件监听相关的方法
     */
    tabClick(index) {
      switch (index) {
        case 0:
          this.currentType = "pop";
          break;
        case 1:
          this.currentType = "new";
          break;
        case 2:
          this.currentType = "sell";
          break;
      }
    },

    contentScroll(position) {
      this.isShowBackTop = -position.y > 1000;
    },
    loadMore() {
      this.getHomeGoods(this.currentType);
    },

    /**
     * 网络请求数据
     */
    getHomeMultidata() {
      getHomeMultidata().then((res) => {
        // this.result = res;
        this.banners = res.data.banner.list;
        this.recommends = res.data.recommend.list;
      });
    },
    getHomeGoods(type) {
      const page = this.goods[type].page + 1;
      getHomeGoods(type, page).then((res) => {
        this.goods[type].list.push(...res.data.list);
        this.goods[type].page += 1;

        this.$refs.scroll.finishPullUp();
      });
    },
  },
};
</script>

<style scoped>
#home {
  /*padding-top: 44px;*/
  height: 100vh;
  position: relative;
}

.home-nav {
  background-color: var(--color-tint);
  color: #fff;

  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 9;
}

.tab-control {
  position: sticky;
  top: 44px;
  z-index: 9;
}

.content {
  overflow: hidden;

  position: absolute;
  top: 44px;
  bottom: 49px;
  left: 0;
  right: 0;
  z-index: 5;
}

/*.content {*/
/*height: calc(100% - 93px);*/
/*overflow: hidden;*/
/*margin-top: 44px;*/
/*}*/
</style>
